121005201871 has 2 divisors, whose sum is σ = 121005201872. Its totient is φ = 121005201870.

The previous prime is 121005201869. The next prime is 121005201883. The reversal of 121005201871 is 178102500121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121005201871 - 2¹ = 121005201869 is a prime.

Together with 121005201869, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121005201571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60502600935 + 60502600936.

It is an arithmetic number, because the mean of its divisors is an integer number (60502600936).

Almost surely, 2^121005201871 is an apocalyptic number.

121005201871 is a deficient number, since it is larger than the sum of its proper divisors (1).

121005201871 is an equidigital number, since it uses as much as digits as its factorization.

121005201871 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1120, while the sum is 28.

Adding to 121005201871 its reverse (178102500121), we get a palindrome (299107701992).

The spelling of 121005201871 in words is "one hundred twenty-one billion, five million, two hundred one thousand, eight hundred seventy-one".